Process of opening sheet and tin-plate packs



Apr. 3, 1923.

W. NEWBY v PROCESS OF OPENING SHEET AND TIN PLATE PACKS YFiled Aug. 2'7,1920 2 sheets-sheet 2 Y CA2 'g' l I 7 L/ wiwwfwwwwwm@www ,ff y WW1/T////M j W f//mzf Xgl/gle.

ATTORNEYJ' Patented Apr. 3, i923.

WILLIAM NWBY, OF YOUNGSTOWN, OHIO.

PROCESS OF OPENING SHEET AND TIN-PLATE PACKS.

Application filed August 27, 1920.

To ZZ whom t may concern.'

Be it known that l, WILLIAM NnwBY, a citizen of the United States,residing at `Youngstown, in the county of Mahoning and State of Ohio,have invented new and useful improvements in Processes of Opening Sheetand Tin-Plate Packs, of which the following is a specification.

The present invention relates to a process of opening sheet and tinplate packs by means of crimping the pack and then flat teningout thecrimps or corrugations, and has for its object, to more thoroughlyrender the pack apart, and at the same time to more thoroughly Iflattenthe sheets which make up the pack. The accompanying drawing illustratesthe methods by which these objects are obtained, and in said annexeddrawings Fig. l shows the usual process of opening sheet and tin plateacks by crimping and flattening the same; iig. 2 shows the use offlattening rolls at an angle; Fig. 3 shows the use of crimping rolls atan angle through the pack; Fig. e shows the use of flattening rollsarranged to be used with packs crimped as shown in Fig. 3; Fig. 5 is asectional view through a crimped pack in lwhich the pack and crimps areillustrated in full size and the pitch or distance between corrugations'is shown as that which has been found necessary in order to obtain athorough breaking apart of the sheets; Fig. 6 is a plan view of acrimped pack drawn to the same proportions as in Fig. 5, but on areduced scale; Fig. 7 4shows a section through a crimped pack on a planeat right angles to the crimps therein, as indicated by the line 7 7,Fig. 6, the pack being shown in position between flattening rolls, theaxes of which are parallel to such line 7 7 and Fig. 8 is a sectionthrough such crimped pack, the plane of the section being indicated bythe line 8w8, Fig. 6, which lies approximately at the same angle as dothe axes of the flattening rolls in my present improved process.

ln the usual process, as shown in Fig. l, the corrugations or crimps land 9. are formed straight across the pack, and the pack is adapted totravel directly from the crimping rolls 3 to the flattening rolls 4. Theflattening rolls are parallel to the crimping rolls and then parallel tothe corrugations, and the eect of this is to cause the pack to pitch orweave as it goes through the flattening rolls, and then to leave theSerial No. 406,437.

rolls with bends corresponding to the crimps. This is undesirable andthe pack does not receive the required amount of flattening to cause thesheets to break away from each other.

ln my improved process the pack after it has been crimped or corrugatedin the manner shown in Fig. l, is passed through flattening rolls 5which are mounted at an angle to the corrugations or crimps as bestshown in Fig. 2, so that the rolls will span two or more of thecorrugations thereby obtaining the maximum flattening effect andthemaximum tendency to completely break the sheets apart.

This same effect may be obtained by passing the pack 6 through crimpingrolls 3, which are placed at an angle to the pack and then passing thecrimp pack through flattening rolls 5, placed directly across the packas shown in Fig. 4;. Here again the flattening rolls will span two ormore of the crimps or corrugations in the pack so that the pack willreally be flattened and will not weave through the rolls as often donein the usual method, as illustrated in Fig. l.

It will be understood that packs of tin plate and like material are madeup from two sheets of No. 16 gage steel to about twelve sheets of No. 30gage steel, which makes the packs about one-eighth of an inch thick. Inthe reheating and rolling of these packs, the sheets 'become more orless welded together, sometimes only to such a slight extent that eachindividual sheet may be gripped at one corner by a pair of tongs andstripped oft' without much effort, but other packs become weldedtogether to such an extent that the sheets will tear apart or breakbefore leaving each other. lt has been found by actual test that to makethese sheets break away from each other by crimping or corrugating andthen flattening the packs, that the crimps must be made deep and not toowide apart. It is, furthermore, important that the sheets be thereaftersul"- ficiently flattened out; otherwise they require either to beseparately rolled smooth or else sold at a reduced price.

Where a pack is crimped with the crimps running all the way across thepack of the size shown in Fig. 5 of the drawing, it is impossible toflatten down such crimps by running them through a pair of flatteningrolls in the ordinary way, since the result will be that the crimpsbecome buckled or doubled and the value of the pack thus completelydestroyed. However, Where the crimps in such pack are formed at an anglesuch that when the pack is passed through the flattening rolls, thecrimps will spread out sidewise from the center towards the ends of therolls, the pack may be flattened dovvn with a minimum of buckling ortearing, While at the same time a maximum separation of sheets isobtained.

The action just described will be better understood by a comparison ofFigs. 7 and 8 of the drawing. It Will be noted that the Width of thestrips on the roll contact line are vconsiderably Wider in Fig. 8, Wherethe roll lies at a slight angle to the crimps, than in Fig. 7, Where therolls are disposed at a right angle to such crimps. In other Words, the.pitch of the crimps where rolled out as in Fig. 7 is equal only to thedistance C on Fig. 6, While the pitch of the crimps Where rolled out asin Fig. 8 is equal to the distance D on Fig. 6.

Other modes of applying the principle of my invention may be employedinstead oi. the one explained, change being made as regards the methodherein disclosed, provided the stepor steps stated by any of thefollowing claims or the equivalent of such stated step or steps beemployed.

I therefore particularly point `out and distinctly claim as my inventionl. In a method of opening sheet and tin plate packs, the steps whichconsist in forming the p'ack with a series of parallel crimps orcorrugations disposed at an angle less than a right angle to the ends ofsuch pack, and then passing such pack through a pair of flattening rollsset at an angle less than a right angle to such crimps.

2. The method of opening sheet tin plate packs consisting of passingthem through a pair of crimping rolls and then passing them through apair of flattening rolls placed at an angle less than a right angle tothe crimps whereby the rolls will span two or more ot the crimps but notall of the crimps in the pack. l

3. In a method of opening sheet and tin plate packs, the steps whichconsist in pass ing the pack through a pair of crimping rolls disposedtocrimp such pack at an'angle less than a right angle relatively totheends of such pack, and then `passing such pack through a pair offlattening rolls set at au i angle lessthan a right angle to suchcrimps.

